Air-pump connection.



Patented Nov. 5', |90l.

s. E. HART. AIR PUMP CONNECTION.

(Apprication med Jaulas, 1901.)

(No Model.)

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UNITED STATES PATENT EETCE.

SAMUEL E. IIART, OF WILMINGTON, DELAIVARE.

AIR-PUMP CONNECTION.

SPECIFICATION forming part of Letters Patent No. 686,061, dated November5, 1901. Application filed January 26,1901. SeriallNo. 44,890. (Nomodel.)

To all whom, it may concern:

Beitknown that I, SAMUEL'E. HART, a citizen ofthe United States,residing at. Wilming-A ton, in the' county of Newcastle and State ofpneumatic tires for bicycles and other kinds of vehicles, the connectionbeing Vsimple and eilcient and of such a character as to take up wearand prevent waste of air.

The improved appliance involves as one of its essential features` abarrel having key- Ways, a hub surrounding the barrel also havingkeyways, keys itted in the respective keyways, and means to hold thekeys in place. I provide, in connection with the foregoing elements, atube slidably fitted on the barrel adapted to receive the usual flexibletube or piping connected with the air-pump, the periphery of thefirst-mentioned tube being of a formation that Will maintain theflexible tube rmly in place, and means on the barrel to force thc tubeagainst the hub to thereby close all unnecessary openings. A convenientmeans of securing the keys in place (said keys being freely fitted intheir keyways) consists of a split washer placed in a counterbore formedin the face of the hub and preferably rigidly secured to the latter, andin practice I prefer to interpose between the split washer and thetire-nozzle a second washer, which aids in assuring a snug joint. Themembers briefly outlined may be of any suitable character and arrangedin different ways within the scope of the appended claims.

The invention is shown in one convenient and efficient form thereof inthe accompanying drawings,constituti ng a part of this speciication.

Figure l is a cross-sectional elevation of a portion of a cycle-tirewith my pipe connection united thereto. Fig. 2 is a longitudinal centralsection of the barrel, tube, and other parts thereon. Fig. 3 is anelevation of the barrel, and Fig. 4 is a face view of the hub and thesplit Washer therein.

Like characters refer to like parts in all the figures of the drawings.

bored centrally its entire length and externally threaded, as at S, atits inner end. to engage the internal threads on the nozzle 6, asindicated in Fig. 1. To the rear or back of the thread S an annulargroove or fillet 9 is formed, its bottom being below said threads,

and beyond the groove the barrel is turned straight, constituting abearing-surface up to `the shoulder or collarlO, the inner face of whichis squared and the outer end of the barrel being conveniently tapered.There are formed in said barrel the dianietrically opposite keyways orslots 12, opening into the annular groove or fillet 9 and extending in astraight direction rearward therefrom. On the rear portion of thecentral barrel 7 the sleeve 13 is freely and slidably Iitted, itsextreme outer end being counterbored, as at 414:, to fit over theannular collar or shoulder l0 on said barrel. The loose sleeve has itsouter surface roughened, so as to more perfectly retain the hose orpipel of the airpumpin place. This roughening of the sleeve I may secureby transversely grooving or scoring the same, as shown at 16, thegrooves conveniently extending the entire length thereof. A hub or ring,as 17, surrounds the central barrel 7, it being freely slidable thereonand having its periphery roughened or knurled to secure its readymanipulation, and it is adjacent to the slidable couplingsleeve 13. Thewall of the central opening or bore of the knurled hub or ring has thediametrically opposite keyways 18, mating or corresponding with those onthe central barrel; but the keyways 12 are longer than the others,thispermitting the longitudinal movement of the hub on the central barrel.The keys are denoted by 19, and they are4 represented as consisting ofpins, circular in crosssection, adapted to be dropped inthecoinplemental keyways in the hub and barrel, respectively, said keywaysbeing substantially semicircular in cross-section. The outer face of theknurled hub 17 is counterbored, as at 20, the counterbore being alinedwith the anion nular groove or fillet 9. counterborea split washer, as21, which fits tightlytherein and which extends into the groove 9, butis entirely free of the walls of the latter. This washer is preferablyrigidly held in place, it being conveniently soldered to the hub, andbeing partially diposed in the grooves it prevents the hub from slippingover the thread 8. The keys 19 are freely fitted in their seats, andtheir inner ends abut against the Washer 21, the latter thereby servingto hold the keys in place or against falling from their seats. 'Iheouter face of the split washer is flush or in the plane of thecorresponding face of the hub or ring 17, and a Washer, as 22, ofleather or equivalent material, fits against the same and surrounds theouter end of the barrel.

To inflate a tire, the threaded end of the barrel 7 will be inserted inthe nozzle G, and said barrel Will be then turned by rotating the hub orring. As lthe barrel turns it will be simultaneously moved forward, andits annular shoulder 10 bearing against the sleeve will carry the sametherewith and force it against the hub. This operation will be continueduntil the hub is wedged firmly against the washer 22 and the latteragainst the nozzle. This will result in positively closing all places atwhich air might waste during the inilat-ion of the Itire.

The keys or pins 19 rotatively connect the barrel and hub, whereby, ineffect, these parts constitute a single rotative element, and during thecoupling operation the keys or pins slide in their seats in the barrel,being held against displacement from their seats in the hub 17 by thesplit washer 21.

The parts are assembled as follows: The sleeve 13 is placed on thebarrel 7 and slid along the same'until the shoulder 10 on said barrel isseated in the counterbore or recess 14. The keys 19 are then inserted inthe keyways 12 in the barrel 7, after which the hub or ring 17 isslipped over the forward end of the barrel, so that said keys can beentered in the keyways 18 in said hub. With the parts thus mounted thesplit washer 21 is inserted in the recessed end of the hub and issuitably secured in place-for example, by solder. When lthe union ismade, the pump (not shown) can be operated to inflate the tire.

Having described the invention, what I claim is- 1. In a device of theclass described, abarrel having keyways, a hub surrounding the I mayplace in this' barrel, having complemental keyways, keys fitted -in therespective keyWays, va sleeve slidable on the barrel and adapted toengage the hub, and means on the barrel to force the sleeve forward asthe barrel is advanced, and means on the hub to prevent the keys frombeing displaced.

2. In a device of the class specified, a barrel having keyways, a hubsurrounding the barrel, having corresponding keyways, keys fitted in therespective keyways, a sleeve slidable on the barrel and adapted toengage the hub, means on the hub to prevent the keys from beingdisplaced, and a shoulder on the barrel to engage the sleeve.

3. In a device of the class specified, a barrel having a keyway, a hubon vthe barrel having a complemental keyway, a key in the respectivekeyways, means to prevent the displacement of said key, a sleeveslidable on the barrel, and means for jamming said sleeve against thehub as the latter is turned.

4. In a device of the class specified, a barrel having keyways, ahubloose on said barrel, having corresponding keyways, anv annular shoulderon the barrel, a sleeve slidable on the barrel between the shoulder andhub, having a counterbore to receive said shoulder, and keys loose insaid keyways.

5. In a device of the class specified, a barrel having keyways and anannular groove, a hub loose on said barrel, having correspondingkeyways, a washer secured-rigidly to the hub and partially disposed insaid groove,

keys loose in the keyways and adapted to engage the washer, a sleeveslidable on the barrel and adapted to engage the hub, and an annularshoulder on the barrel to lit against the sleeve.

6. In a device of the class specied, a barrel having keyways and anannular groove, a hub loose on the barrel, having corresponding keywaysand a counterbore in one face, a split Washer secured in saidcounterbore and partially disposed in said groove, keys loose in saidkeyways, adapted to abut against the split washer, a sleeve slidable onthe barrel, having a counterbore, and an annular shoulder on the barrel,to iit'in said counterbore.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit- DGSSQS.

SAMUEL E. HART. Witnesses:

CHARLES G. GUYER, A. B. RoBERsoN.

IOO

